/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigSpaceHierarchy.h
Pretty weird that this type is copy/move assignable (needed for USTRUCTs) but not copy/move constructible.
FRigSpaceHierarchy ( [FRigSpaceHierarchy](API\Plugins\ControlRig\Rigs\FRigSpaceHierarchy) && InOther )